CN112523972A - Complete machine ground test system and test method for wind generating set - Google Patents
Complete machine ground test system and test method for wind generating set Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 76
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 238000010248 power generation Methods 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 43
- 238000010168 coupling process Methods 0.000 claims description 43
- 238000005859 coupling reaction Methods 0.000 claims description 43
- 230000003014 reinforcing effect Effects 0.000 claims description 39
- 239000003921 oil Substances 0.000 claims description 17
- 230000003749 cleanliness Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
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- 230000001050 lubricating effect Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 3
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- 239000012208 gear oil Substances 0.000 claims description 3
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- 238000009434 installation Methods 0.000 abstract description 5
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a complete machine ground test system of a wind generating set and a test method thereof, and the complete machine ground test system comprises a test platform, two units to be tested, yaw support tools and a flexible connecting shaft device without axial force, wherein the two units to be tested are symmetrically arranged on the test platform through the two yaw support tools and are mutually power sources, a transmission chain of the unit to be tested is in a horizontal state through the yaw support tools, the flexible connecting shaft device without axial force is arranged between the two units to be tested and is respectively and rigidly connected with the two units to be tested through connecting flanges at two ends of the flexible connecting shaft device, and the power provided by one unit to be tested is transmitted to the other unit to be tested through the flexible connecting shaft device, so that the power generation capacity of the unit to be tested is simulated. The invention can effectively solve the problems of difficult installation and high cost of the existing test system.
Description
Technical Field
The invention relates to the technical field of ground test of a complete machine of a wind generating set, in particular to a ground test system and a ground test method of the complete machine of the wind generating set.
Background
At present, the development of a wind generating set exceeds 10MW, 12MW units are hoisted abroad, 8-10MW units are developed by domestic wind power complete machine manufacturers, the whole wind generating set is developed towards the routes of sea, large capacity and the like, under the condition, the reliability of the complete machine is particularly important, the problems need to be eliminated as much as possible through the ground test of the complete machine, and the service life of the complete machine is prolonged. According to the relation between the current capacity and the weight of the whole machine, the mass of the whole machine with the power of 8MW is about 300t (the weight of the machine with the same power is in a range due to different technical routes of whole machine manufacturers of various wind generating sets).
The whole weight of the wind generating set is continuously improved, great difficulty is brought to the whole machine test, according to the existing whole machine test method of the wind generating set, the bottom of the wind generating set is fixed in a yaw connection mode, and the rotating speed and the torque of the wind generating set are provided for the test in a mode of externally connecting a power source (prime motor) to simulate the power generation of the wind generating set. A large universal coupling is connected between a power source and a test wind generating set, and the large universal coupling is used for transmitting torque so as to test the axial tension of a transmission chain of the wind generating set, so that the coupling is required to bear the torque of 12500 kN.m (the torque converted to the coupling according to the 8500kW of the test wind generating set). At present, manufacturers for producing large universal couplings in China are few and few, the manufacturing cost is very high, the couplings for testing 8MW wind generating sets are taken as examples, the length dimension exceeds 5 meters, the weight reaches more than 50t, the manufacturing cost exceeds 300 ten thousand, the centering precision is required to be high when the large universal couplings are installed, otherwise, fixing bolts cannot be installed due to hole aligning deviation, and great difficulty is brought to the ground test of the whole wind generating sets.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a complete machine ground test system of a wind generating set and a test method thereof, and can effectively solve the problems of difficult installation and high cost of the existing test system.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the utility model provides a wind generating set complete machine ground test system, includes test platform, the unit that awaits measuring, driftage support frock and the flexible even axle device of no axial force, the unit that awaits measuring has two, and these two units that await measuring are adorned on test platform through two driftage support frock symmetries, and these two units that await measuring are the power source for each other, the driftage support frock makes the driving chain of the unit that awaits measuring be the horizontality, the flexible even axle device of no axial force locates between two units that await measuring to respectively through the flange at its both ends and two unit rigid connection that await measuring, through flexible even axle device with the power transmission that the unit that awaits measuring provided to another unit that awaits measuring, realize the generating capacity of simulation test unit that awaits measuring.
Further, flexible shaft coupling device includes first shaft dish, second shaft dish and is used for connecting the flexible connection rope of two shaft dishes, the external diameter of first shaft dish is greater than the external diameter of second shaft dish, and these two shaft dishes pass through high-strength stud rigid connection with two units that await measuring respectively.
Further, the first connecting shaft disc comprises a first annular base plate, a first connecting flange, a first inner cylinder reinforcing rib plate, a first outer cylinder reinforcing rib plate and a first lifting lug; the outer diameter of the first annular chassis is larger than that of the first connecting flange, and the first annular chassis and the first connecting flange are welded at two ends of the first inner cylinder respectively; the outer side of the first connecting flange is connected with a hub of the unit to be tested through a high-strength stud; a plurality of first inner cylinder reinforcing rib plates for reinforcing the rigidity of the first inner cylinder are uniformly distributed on the outer peripheral surface of the first inner cylinder and between the first annular chassis and the first connecting flange; the outer diameter of the first outer cylinder is larger than that of the second coupling disc and is welded at the outer edge of the first annular chassis, a plurality of first outer cylinder reinforcing rib plates for reinforcing the rigidity of the first outer cylinder reinforcing rib plates are uniformly distributed on the inner peripheral surface of one side of the first outer cylinder, which is close to the second coupling disc, a plurality of first lifting lugs are uniformly distributed on the inner peripheral surface of the side, the number of the first lifting lugs is the same as that of the second lifting lugs of the second coupling disc, the first lifting lugs and the second lifting lugs are in one-to-one correspondence, and the first lifting lugs and the second lifting lugs are flexibly connected through flexible connecting ropes.
Further, the second coupling disc comprises a second annular base plate, a second connecting flange, a second inner cylinder reinforcing rib plate, a second outer cylinder reinforcing rib plate and a second lifting lug; the outer diameter of the second annular chassis is larger than that of the second connecting flange, and the second annular chassis and the second connecting flange are welded at two ends of the second inner cylinder respectively; the second connecting flange is connected with a hub of the unit to be tested through a high-strength double-ended stud; a plurality of second inner cylinder reinforcing rib plates for reinforcing the rigidity of the second inner cylinder are uniformly distributed on the outer peripheral surface of the second inner cylinder and between the second annular chassis and the second connecting flange; the second outer cylinder is welded at the edge of the second annular chassis, the outer diameter of the second outer cylinder is smaller than that of the first connecting shaft disc, a plurality of second outer cylinder reinforcing rib plates for reinforcing the rigidity of the second outer cylinder are uniformly distributed on the inner circumferential surface of the second outer cylinder, a plurality of second lifting lugs are uniformly distributed on the outer circumferential surface of the second outer cylinder reinforcing rib plates along the circumference of the second outer cylinder reinforcing rib plates, the number of the second lifting lugs is the same as that of the first lifting lugs of the first connecting shaft disc, the second lifting lugs correspond to the first lifting lugs one by one, and the second.
Further, the flexible connecting rope is an ultra-high molecular weight polyethylene cable.
The invention also provides a test method of the whole machine ground test system of the wind generating set, which comprises the following steps:
preparation before measurement:
the method comprises the following steps of carrying out static cleaning on a low-speed shaft of a unit to be tested in a static state, starting a lubricating and cooling system of the unit to be tested, filtering oil through a filter element, and carrying out sampling detection on the oil to ensure that the cleanliness meets the requirement; then dynamically cleaning the unit to be tested when the unit to be tested is in no-load operation, simultaneously starting a lubricating and cooling system of the unit to be tested, filtering oil through a filter element, and sampling and detecting the oil to ensure that the cleanliness meets the requirement;
and (3) no-load test:
when the no-load test is started, firstly, starting the generator of one unit to be tested at a set rotating speed, then checking the state of a transmission chain of the unit to be tested, checking whether abnormal conditions of interference abnormal sound and vibration exist, checking whether the rotating speed of the generator, the rotating speed of a main shaft, the no-load voltage of the generator and data of each temperature measuring point are normal or not and recording, checking whether a flexible connecting rope of the flexible connecting shaft device is in a tensioned state or not, and increasing the rotating speed by a set step length and increasing the rotating speed to a rated rotating speed after the flexible connecting rope is qualified; staying for a set time at each no-load rotation speed test point, recording the cold-state no-load voltage, checking the reference value of the cold-state no-load voltage, and determining that the no-load voltage is qualified when the deviation of the no-load voltage and the reference value does not exceed a set value under the rated rotation speed;
and (3) acceleration loading test:
dragging the unit to be tested to a grid-connected rotating speed, increasing the rotating speed to a rated rotating speed after grid connection, and then gradually increasing the power; the method comprises the steps of grid-connected loading, power increasing step by a set step length, and monitoring whether data of various sensors of voltage, current, power factor, frequency, rotating speed, temperature and vibration of a unit to be tested are normal or not in the loading process;
temperature rise test:
after the loading test is finished, keeping the unit to be tested to operate at a rated rotating speed and a rated power until the temperature of each generator, gear box and frequency converter part of the unit to be tested reaches a stable state, testing the temperature change of the same part of the standby unit within a set time, wherein the temperature rise is stable and meets the requirement, and dragging the unit to be tested to stop rotating after the temperature change is finished;
testing a power curve:
the method comprises the steps that the rotating speed of a unit to be tested is increased to the rotating speed of a loading point, then loading is carried out, target power is output to another unit to be tested according to the torque of the unit to be tested, active power corresponding to different units to be tested at different rotating speeds is recorded, and a rotating speed-power curve is drawn;
and (4) checking after measurement:
after the test is finished, the gear oil of the unit to be tested is sampled and tested again, and the cleanliness meeting requirements is ensured.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the testing system has the advantages of simple structure and convenience in installation, two sets can be installed at one time, and the two sets are mutually motors to be used as prime movers for testing, so that the working efficiency is greatly improved; meanwhile, the unit is safer and more reliable by verifying the design conformity of the unit.
2. The flexible coupling device without axial force allows the installation error of the two units to be larger, and the two couplings are flexibly connected by high-strength cables, so that the requirement on the centering precision of the two units can be reduced, and the installation difficulty and the manufacturing cost are greatly reduced.
3. The testing system and the method thereof can be applied to unit testing with 8500kW of power, and the testing power can reach 8500 kW.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the flexible coupling device of the present invention.
FIG. 3 is a front view of the flexible coupling of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
As shown in fig. 1, the complete machine ground test system of the wind generating set according to the embodiment includes a test platform 1, a unit to be tested 2, a yaw support tool 3 and a flexible coupling device without axial force; the two units to be tested 2 are symmetrically arranged on the test platform 1 through two yaw support tools 3, each unit to be tested 2 is connected with the yaw support tool 3 through a yaw mechanism 6 at the bottom of the unit to be tested 2, the two units to be tested 2 are mutually used as power sources, the unit to be tested 2 is prevented from overturning under the action of overturning moment through the yaw support tools 3, and a transmission chain of the unit to be tested 2 is in a horizontal state; the flexible coupling shaft device without axial force is arranged between the two units to be tested 2 and is respectively and rigidly connected with the two units to be tested 2 through connecting flanges at two ends of the flexible coupling shaft device, and power provided by one unit to be tested is transmitted to the other unit to be tested through the flexible coupling shaft device, so that the power generation capacity of the unit to be tested is simulated and tested.
As shown in fig. 2 and 3, the flexible coupling device includes a first coupling disc 4, a second coupling disc 5, and a flexible connecting rope (not shown) for connecting the two coupling discs, wherein the flexible connecting rope is an ultra-high molecular weight polyethylene cable with a diameter of phi 20 mm; the first connecting shaft disc 4 can be welded by adopting Q345 steel, when the ambient temperature is lower than-20 ℃, the steel above Q345D is required to be welded, the whole outer diameter size is 5000mm, the first connecting shaft disc comprises a first annular base disc 401, a first connecting flange 402, a first inner cylinder 403, a first inner cylinder reinforcing rib plate 404, a first outer cylinder 405, a first outer cylinder reinforcing rib plate 406 and a first lifting lug 407, the outer diameter of the first annular base disc 401 is larger than that of the first connecting flange 402, the first annular base disc 401 and the first connecting flange 402 are respectively welded at two ends of the first inner cylinder 403, the outer side of the first connecting flange 402 is connected with the hub of the unit to be tested 2 through a high-strength double-ended stud, a plurality of first inner cylinder reinforcing rib plates 404 for reinforcing the rigidity of the first annular base disc 401 and the first connecting flange 402 are uniformly distributed on the outer peripheral surface of the first inner cylinder 403, and an observation hole is further arranged on the first inner cylinder 403, the outer diameter of the first outer cylinder 405 is larger than that of the second coupling disc 5, and the first outer cylinder 405 is welded to the outer edge of the first annular base plate 401, a plurality of first outer cylinder reinforcing rib plates 406 for reinforcing the rigidity of the first outer cylinder reinforcing rib plates are uniformly distributed on the inner circumferential surface of one side, close to the second coupling disc 5, of the first outer cylinder 405, and a plurality of first lifting lugs 407 are uniformly distributed on the edge of the inner circumferential surface of the side; the outer diameter of the second coupling disk 5 is 4500mm, and the second coupling disk comprises a second annular chassis 501, a second connecting flange 502, a second inner cylinder 503, a second inner cylinder stiffened plate 504, a second outer cylinder 505, a second outer cylinder stiffened plate (not shown in the figure) and a second lifting lug 507, the outer diameter of the second annular chassis 501 is larger than that of the second connecting flange 502, the second connecting flange 504 and the second lifting lug are respectively welded at two ends of the second inner cylinder 503, the second connecting flange 502 is connected with the hub of the testing unit 2 through a high-strength stud, a plurality of second inner cylinder stiffened plates 504 for stiffening the rigidity of the second annular chassis 501 are uniformly distributed on the outer circumferential surface of the second inner cylinder 503 and between the second annular chassis 501 and the second connecting flange 502, an observation hole is further arranged on the second inner cylinder 503, the second outer cylinder 505 is welded at the edge of the second annular chassis 501, and the outer diameter of the second outer cylinder is smaller than that of the first coupling disk 4, a plurality of second outer cylinder reinforcing rib plates for reinforcing the rigidity of the inner circumferential surface of the lifting device are uniformly distributed on the inner circumferential surface of the lifting device, a plurality of second lifting lugs 507 are uniformly distributed on the outer circumferential surface of the lifting device along the circumference of the lifting device, the number of the second lifting lugs 507 is the same as that of the first lifting lugs 407, the second lifting lugs 507 are in one-to-one correspondence, the radial distance between each first lifting lug 407 and the corresponding second lifting lug 507 is more than or equal to 190mm, and the first lifting lugs 407 and the second lifting lugs 507 in one-to-one correspondence are flexibly connected through flexible.
Simulation calculation of the flexible coupling device is carried out by using Ansys simulation software, a force transmission mode is converted from a direction parallel to a transmission chain to a radial force vertical to the transmission chain, an axial force is converted into the radial force, a formula T is 9550P/n according to the maximum test power of a test system, namely 15MW and the rotating speed of 7r/min, wherein T represents torque, P represents power, and n represents the rotating speed, the test torque is calculated from the maximum test power and is 21967kN m, further the tangential force of the flexible coupling device is 8786.82kN, the radial force of a lifting lug of the flexible coupling device is 97.29kN, and the stress of a single flexible connecting rope between two corresponding first lifting lugs and a second lifting lug is 79.85 kN; and carrying out grid modeling on the flexible connecting shaft device by using Ansys software, and measuring the maximum stress of the flexible connecting shaft device to be 257MPa according to the parameters to meet the strength requirement of the material.
The embodiment also provides a test process of the complete machine ground test system of the wind generating set, which comprises the following steps,
preparation before measurement:
static cleaning is carried out on the unit to be tested in a static state of the low-speed shaft for 2 hours, meanwhile, a lubricating and cooling system of the unit to be tested is started, oil is filtered through a filter element, an oil cleanliness tester is used for sampling and detecting the oil after cleaning, the cleanliness of the lubricating oil is ensured to be qualified, and the qualified standard is that the cleanliness of the lubricating oil is 17/15/12; and then dynamically cleaning the unit to be tested in the idle running state for 2 hours, simultaneously starting a lubricating and cooling system of the unit to be tested, filtering oil through a filter element, and sampling and detecting the oil by using an oil cleanliness tester after cleaning to ensure that the cleanliness of the lubricating oil is qualified, wherein the qualified standard is that the cleanliness of the lubricating oil is 17/15/12.
And (3) no-load test:
when the no-load test is started, firstly, starting the generator of one unit to be tested at a rotating speed of 50rpm, then checking the state of a transmission chain of the unit to be tested, checking whether abnormal conditions of interference abnormal sound and vibration exist, checking whether the rotating speed of the generator, the rotating speed of a main shaft, the no-load voltage of the generator and data of each temperature measuring point are normal or not and recording, checking whether a flexible connecting rope of the flexible connecting shaft device is in a tensioned state or not, increasing the rotating speed at a step length of 50rpm after the flexible connecting rope is qualified, and increasing the rotating speed to a rated; and (3) staying for 3 minutes at each no-load rotation speed test point, recording the cold-state no-load voltage, checking the reference value of the cold-state no-load voltage, and determining that the no-load voltage is qualified when the deviation of the no-load voltage and the reference value is not more than +/-10V under the rated rotation speed.
And (3) acceleration loading test:
dragging the unit to be tested to a grid-connected rotating speed, increasing the rotating speed to a rated rotating speed after grid connection, and then gradually increasing the power; the grid-connected loading is used for gradually increasing power by 1% of rated torque step length, and whether the data of various sensors of voltage, current, power factor, frequency, rotating speed, temperature and vibration of the unit to be tested are normal or not is monitored in the loading process.
Temperature rise test:
and after the loading test is finished, the unit to be tested is kept to operate at the rated rotating speed and the rated power until the temperature of each generator, gear box and frequency converter part of the unit to be tested reaches a stable state, the temperature change of the same part of the unit to be tested does not exceed 2 ℃ within 1 hour, the temperature rise is stable and meets the requirement, and after the loading test is finished, the unit to be tested is dragged to stop rotating.
Testing a power curve:
the method comprises the steps of firstly increasing the rotating speed of a unit to be tested to the rotating speed of a loading point, then loading, giving and outputting target power to another unit to be tested through the torque of the unit to be tested, recording active power corresponding to different units to be tested at each rotating speed, and drawing a rotating speed-power curve.
And (4) checking after measurement:
and after the test is finished, sampling and testing the gear oil of the unit to be tested again. And (3) detecting the oil by adopting an oil cleanliness detector, wherein the cleanliness at least meets 17/15/12, and the oil is qualified. After the test is finished, the internal condition of the gear box is checked by an endoscope.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that variations based on the shape and principle of the present invention should be covered within the scope of the present invention.
Claims (6)
1. The utility model provides a wind generating set complete machine ground test system which characterized in that: the device comprises a test platform, units to be tested, a yaw supporting tool and a flexible connecting shaft device without axial force, wherein the units to be tested are provided with two units, the two units to be tested are symmetrically arranged on the test platform through the two yaw supporting tools and are mutually power sources, the yaw supporting tool enables a transmission chain of the unit to be tested to be in a horizontal state, the flexible connecting shaft device without axial force is arranged between the two units to be tested and is respectively and rigidly connected with the two units to be tested through connecting flanges at two ends of the flexible connecting shaft device, and power provided by one unit to be tested is transmitted to the other unit to be tested through the flexible connecting shaft device, so that the power generation capacity of the unit to be tested is simulated.
2. The complete machine ground test system of the wind generating set according to claim 1, characterized in that: the flexible coupling device comprises a first coupling disc, a second coupling disc and a flexible connecting rope for connecting the two coupling discs, wherein the outer diameter of the first coupling disc is larger than that of the second coupling disc, and the two coupling discs are respectively and rigidly connected with two units to be tested through high-strength double-end studs.
3. The complete machine ground test system of the wind generating set according to claim 2, characterized in that: the first connecting shaft disc comprises a first annular base plate, a first connecting flange, a first inner cylinder reinforcing rib plate, a first outer cylinder reinforcing rib plate and a first lifting lug; the outer diameter of the first annular chassis is larger than that of the first connecting flange, and the first annular chassis and the first connecting flange are welded at two ends of the first inner cylinder respectively; the outer side of the first connecting flange is connected with a hub of the unit to be tested through a high-strength stud; a plurality of first inner cylinder reinforcing rib plates for reinforcing the rigidity of the first inner cylinder are uniformly distributed on the outer peripheral surface of the first inner cylinder and between the first annular chassis and the first connecting flange; the outer diameter of the first outer cylinder is larger than that of the second coupling disc and is welded at the outer edge of the first annular chassis, a plurality of first outer cylinder reinforcing rib plates for reinforcing the rigidity of the first outer cylinder reinforcing rib plates are uniformly distributed on the inner peripheral surface of one side of the first outer cylinder, which is close to the second coupling disc, a plurality of first lifting lugs are uniformly distributed on the inner peripheral surface of the side, the number of the first lifting lugs is the same as that of the second lifting lugs of the second coupling disc, the first lifting lugs and the second lifting lugs are in one-to-one correspondence, and the first lifting lugs and the second lifting lugs are flexibly connected through flexible connecting ropes.
4. The complete machine ground test system of the wind generating set according to claim 2, characterized in that: the second coupling disc comprises a second annular base plate, a second connecting flange, a second inner cylinder reinforcing rib plate, a second outer cylinder reinforcing rib plate and a second lifting lug; the outer diameter of the second annular chassis is larger than that of the second connecting flange, and the second annular chassis and the second connecting flange are welded at two ends of the second inner cylinder respectively; the second connecting flange is connected with a hub of the unit to be tested through a high-strength double-ended stud; a plurality of second inner cylinder reinforcing rib plates for reinforcing the rigidity of the second inner cylinder are uniformly distributed on the outer peripheral surface of the second inner cylinder and between the second annular chassis and the second connecting flange; the second outer cylinder is welded at the edge of the second annular chassis, the outer diameter of the second outer cylinder is smaller than that of the first connecting shaft disc, a plurality of second outer cylinder reinforcing rib plates for reinforcing the rigidity of the second outer cylinder are uniformly distributed on the inner circumferential surface of the second outer cylinder, a plurality of second lifting lugs are uniformly distributed on the outer circumferential surface of the second outer cylinder reinforcing rib plates along the circumference of the second outer cylinder reinforcing rib plates, the number of the second lifting lugs is the same as that of the first lifting lugs of the first connecting shaft disc, the second lifting lugs correspond to the first lifting lugs one by one, and the second.
5. The complete machine ground test system of the wind generating set according to claim 2, characterized in that: the flexible connecting rope is an ultra-high molecular weight polyethylene cable.
6. The test method of the complete machine ground test system of the wind generating set according to any one of claims 1 to 5, is characterized by comprising the following steps:
preparation before measurement:
the method comprises the following steps of carrying out static cleaning on a low-speed shaft of a unit to be tested in a static state, starting a lubricating and cooling system of the unit to be tested, filtering oil through a filter element, and carrying out sampling detection on the oil to ensure that the cleanliness meets the requirement; then dynamically cleaning the unit to be tested when the unit to be tested is in no-load operation, simultaneously starting a lubricating and cooling system of the unit to be tested, filtering oil through a filter element, and sampling and detecting the oil to ensure that the cleanliness meets the requirement;
and (3) no-load test:
when the no-load test is started, firstly, starting the generator of one unit to be tested at a set rotating speed, then checking the state of a transmission chain of the unit to be tested, checking whether abnormal conditions of interference abnormal sound and vibration exist, checking whether the rotating speed of the generator, the rotating speed of a main shaft, the no-load voltage of the generator and data of each temperature measuring point are normal or not and recording, checking whether a flexible connecting rope of the flexible connecting shaft device is in a tensioned state or not, and increasing the rotating speed by a set step length and increasing the rotating speed to a rated rotating speed after the flexible connecting rope is qualified; staying for a set time at each no-load rotation speed test point, recording the cold-state no-load voltage, checking the reference value of the cold-state no-load voltage, and determining that the no-load voltage is qualified when the deviation of the no-load voltage and the reference value does not exceed a set value under the rated rotation speed;
and (3) acceleration loading test:
dragging the unit to be tested to a grid-connected rotating speed, increasing the rotating speed to a rated rotating speed after grid connection, and then gradually increasing the power; the method comprises the steps of grid-connected loading, power increasing step by a set step length, and monitoring whether data of various sensors of voltage, current, power factor, frequency, rotating speed, temperature and vibration of a unit to be tested are normal or not in the loading process;
temperature rise test:
after the loading test is finished, keeping the unit to be tested to operate at a rated rotating speed and a rated power until the temperature of each generator, gear box and frequency converter part of the unit to be tested reaches a stable state, testing the temperature change of the same part of the standby unit within a set time, wherein the temperature rise is stable and meets the requirement, and dragging the unit to be tested to stop rotating after the temperature change is finished;
testing a power curve:
the method comprises the steps that the rotating speed of a unit to be tested is increased to the rotating speed of a loading point, then loading is carried out, target power is output to another unit to be tested according to the torque of the unit to be tested, active power corresponding to different units to be tested at different rotating speeds is recorded, and a rotating speed-power curve is drawn;
and (4) checking after measurement:
after the test is finished, the gear oil of the unit to be tested is sampled and tested again, and the cleanliness meeting requirements is ensured.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104062586A (en) * | 2014-07-03 | 2014-09-24 | 广州电力机车有限公司 | Method employing test bench to check driving motor |
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2020
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